No noticeable changes after two weeks of HCG monotherapy - Am I impatient?

[ecdysone]

I am aware that the full effects probably will take some time to materialize, but I thought I would at least notice a change by now if it were working?

Well I think you have two issues here, so it's best to separate them.

(1) The effects of elevated testosterone [check out the sticky above] can take months to experience, often >3 months.

(2) However, whether the HCG is working is something you could measure after a few weeks by getting some labwork.

You should Goggle the "Shippen HCG protocol" and go from there.